I have created the 10 contents(Article content type) in the Drupal.
And now, I want to associate these contents with new group in CiviCRM.
Please tell me how to associate these things ?
If I understand you correctly, you want to limit who can view content that you have added in Drupal.
To control access to Drupal content you need to create a role in Drupal and assign the correct permissions to this group.
More details here: Users, roles and permissions
If you want to link the access to these articles with a specific group within CiviCRM you will have to synchronise the CiviCRM group with the Drupal role. You can do this using the CiviGroup Roles Sync module.
More details here: CiviGroup Roles Sync